Some of the regional federal reserve bank restarted hiring Research Assistants this week, after nearly 90 days of hiring freeze from mid Jan held by the new government. I have heard for Fed Dallas and Kansas City at least.

RA experiences at regional fed would be really strong foundations and advantages for future Finance/Econ/Business Ph.D application. RA is usually open to both of the BA and master.

Although their websites still show the info of hiring freeze, I have heard the officials sent the messages to applicants about the release of freeze. It's worth to pay close attention.

example
https://www.kansascityfed.org/jobsearch